Analysis

  • max time kernel
    142s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2024, 16:34

General

  • Target

    2024-01-26_e718167d341d13c01d1a1142849ed2cc_cryptolocker.exe

  • Size

    55KB

  • MD5

    e718167d341d13c01d1a1142849ed2cc

  • SHA1

    f6be226d9d947d30407975e9ea45b08125dfea14

  • SHA256

    be8de87d73667fdebb53b6733472584aa4f1d211f9a2150a503cd1565935c152

  • SHA512

    c177da8189e2a33f06f3e8347155cffae001bd81cf6c09f955ee0d5bf42514e090aa6de69c0b24c18169d0e52273385062a2927162596210cfb59091882315be

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFeV0ZOfcpLh:zj+soPSMOtEvwDpj4yh

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • UPX packed file 5 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-26_e718167d341d13c01d1a1142849ed2cc_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-26_e718167d341d13c01d1a1142849ed2cc_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3276
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:1768

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\misid.exe

          Filesize

          55KB

          MD5

          2f46442e516cefa3d10344a155a30f8b

          SHA1

          d5dc926a2326724a29762f4750a3ff08424d4a91

          SHA256

          2591402175aa1a933f31d7bf84dd3fa935c809c1dbb08cf60da331cd52b80ac9

          SHA512

          adf5bfe29df44b75a7746fadfe9a95583a80c18c66808fcada728fafc09499a5c3404aab295b4167500a1ddd8ac9afbddb5e83f6ab2c88a243bcde60089136b0

        • C:\Users\Admin\AppData\Local\Temp\misids.exe

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/1768-19-0x0000000002070000-0x0000000002076000-memory.dmp

          Filesize

          24KB

        • memory/1768-21-0x00000000021D0000-0x00000000021D6000-memory.dmp

          Filesize

          24KB

        • memory/1768-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/1768-49-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3276-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3276-2-0x0000000002310000-0x0000000002316000-memory.dmp

          Filesize

          24KB

        • memory/3276-1-0x0000000002310000-0x0000000002316000-memory.dmp

          Filesize

          24KB

        • memory/3276-3-0x0000000002230000-0x0000000002236000-memory.dmp

          Filesize

          24KB

        • memory/3276-20-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB